Question

for a pure gas and mixture of gases degree of freedom are​

Answer 1

Answer:

If we have a pure gas, there is one phase and one component, and hence two degrees of freedom. (We can vary any two of P, V or T independently.) If we have a liquid and its vapour in equilibrium, there are two phases and one component, and hence F = 1.

Explanation:

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Answer 2

Answer:

Explanation:

Concept:
The degree of freedom refers to how many distinct directions a gas molecule can move in. In the formal description of the state of a physical system, it is a separate physical parameter. The term "degrees of freedom" describes the variety of spatial motions, rotations, and vibrations that a gas phase molecule may make.

Solution:

• One phase, one component, and hence two degrees of freedom are present in a pure gas. (We can independently change any two of P, V, or T.)

• When substances are mixed at same temperature , these are said to be thermal equilibrium (no heat exchange takes place)

• If N gases are mixed (  mixed at same temperature)

             Degree of freedom - f1, f2, .....fn  

             Mole - N1, N2, ....Nn

So sum of internal energy of all the gas molecules remains same.

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